lkml.org 
[lkml]   [2010]   [Jan]   [15]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
Subject[tip:x86/urgent] x86, uv: Add function retrieving node controller revision number
Commit-ID:  7a1110e861b2666ac09f5708d6fbe71d18ce64bb
Gitweb: http://git.kernel.org/tip/7a1110e861b2666ac09f5708d6fbe71d18ce64bb
Author: Jack Steiner <steiner@sgi.com>
AuthorDate: Tue, 12 Jan 2010 15:09:04 -0600
Committer: H. Peter Anvin <hpa@zytor.com>
CommitDate: Fri, 15 Jan 2010 11:08:55 -0800

x86, uv: Add function retrieving node controller revision number

Add function for determining the revision id of the SGI UV
node controller chip (HUB). This function is needed in a
subsequent patch.

Signed-off-by: Jack Steiner <steiner@sgi.com>
LKML-Reference: <20100112210904.GA24546@sgi.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
---
arch/x86/include/asm/uv/uv_hub.h | 12 ++++++++++++
arch/x86/kernel/apic/x2apic_uv_x.c | 6 ++++++
2 files changed, 18 insertions(+), 0 deletions(-)

diff --git a/arch/x86/include/asm/uv/uv_hub.h b/arch/x86/include/asm/uv/uv_hub.h
index bc54fa9..40be813 100644
--- a/arch/x86/include/asm/uv/uv_hub.h
+++ b/arch/x86/include/asm/uv/uv_hub.h
@@ -495,5 +495,17 @@ static inline void uv_hub_send_ipi(int pnode, int apicid, int vector)
uv_write_global_mmr64(pnode, UVH_IPI_INT, val);
}

+/*
+ * Get the minimum revision number of the hub chips within the partition.
+ * 1 - initial rev 1.0 silicon
+ * 2 - rev 2.0 production silicon
+ */
+static inline int uv_get_min_hub_revision_id(void)
+{
+ extern int uv_min_hub_revision_id;
+
+ return uv_min_hub_revision_id;
+}
+
#endif /* CONFIG_X86_64 */
#endif /* _ASM_X86_UV_UV_HUB_H */
diff --git a/arch/x86/kernel/apic/x2apic_uv_x.c b/arch/x86/kernel/apic/x2apic_uv_x.c
index b8bb869..0e48de9 100644
--- a/arch/x86/kernel/apic/x2apic_uv_x.c
+++ b/arch/x86/kernel/apic/x2apic_uv_x.c
@@ -36,6 +36,8 @@ DEFINE_PER_CPU(int, x2apic_extra_bits);

static enum uv_system_type uv_system_type;
static u64 gru_start_paddr, gru_end_paddr;
+int uv_min_hub_revision_id;
+EXPORT_SYMBOL_GPL(uv_min_hub_revision_id);

static inline bool is_GRU_range(u64 start, u64 end)
{
@@ -55,6 +57,10 @@ static int early_get_nodeid(void)
mmr = early_ioremap(UV_LOCAL_MMR_BASE | UVH_NODE_ID, sizeof(*mmr));
node_id.v = *mmr;
early_iounmap(mmr, sizeof(*mmr));
+
+ /* Currently, all blades have same revision number */
+ uv_min_hub_revision_id = node_id.s.revision;
+
return node_id.s.node_id;
}


\
 
 \ /
  Last update: 2010-01-15 20:27    [W:0.104 / U:8.468 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site